This paper introduces the networked automatic alarm system, in which "685 Digital AlarmReceiver" is explored, which is the most important equipment in the system center.
分析了以685数字报警接收主机为中心组成的联网自动报警系统。
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A mathematical model utilizing inlay method and radiation method was built on the basis of the analysis of cover effect of alarmreceiver on alarm system of urban motor vehicles.
Therefore, the proposed receiver is able to reduce packet miss rate and false alarm rate while robust to a severe channel condition, and achieve fast and accurate signal quality detection.